These holders were made until at least 1963 by Graflex. Other manufactures may have continued making them. The 4"x5" "standard" holders [without the groove] are still being made.
So is 1963+ "extremely old"? That you depend on your age.
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I leave the digital work for the urologists and proctologists.
speed graphics i don't believe ever used
the same film holders as graflex slrs ...
the graflex slrs used the grooved / slotted holders
the spring back cameras, speed graphics and
anniversary graphics, and crown graphics all
used "normal" ungrooved/unslotted film holders
you might want to poke around graflex.org, it is a place
that talks about all the graflex / graphic cameras from the very early ones
to the late model ones .. and the people there and archives there are very nice !
i searched there using this " film holders spring back " and got this:
have fun !
I have three different types of holders (newer plastic Fidelty Elites, older metal Fidelity Deluxes and some Riteways) and they are all the same for my Graflock back. As I understand it, these are pretty much a universal holder design for spring backs. As someone mentioned, I'd be wary of the wooden holders or the ones designed for a specific camera by that camera's manufacturer such as Chamonix or Lotus (though I can't see why they wouldn't work - but just be wary). The sellers probably say "if compadible" just to make sure someone who doesn't know what he's buying gets the wrong type (not a spring back, different size camera etc) then tries to get a refund off the seller.
I hear their passionate music, and read the words that touch my heart. I gaze at the feverish picture, oh the secrets that set them apart. When I feel the powerful visions that their fire made alive, I wish I had that instinct, I wish I had that drive.